01 — The Invisible Thief

02 — The Evil Knight

03 — An Empty Cage at Wimbledon Stadium

04 — The Treasure of the Catacombs

05 — The Secret of the Templars

06 — Project Hippocampus

07 — The Octopus Trap

08 — The Serval of the Thames

09 — The Invincible Adversary

10 — The Diamond Gnome

11 — The Attack of the Giant Ant

12 — The Return of Warragul

13 — The Vengeance of the Werewolf

14 — The Forgotten Threat

15 — The Secret Horde

16 — The Lexington Vampire

17 — The Haunted Aviary

18 — The Mystery of Lexington Alley

19 — The Elusive Robin of the Animals

20 — The Riddle Maker

21 — The Nibbler

22 — The Master of Lightning

23 — The Gorgon of Regent's Park

24 — The Phantom of Linford Street

25 — The Spy of Buckingham

26 — The Cause